# Relationship history for MSHA mine 3401197

Current hierarchy: **Centex Corp → Russell Creek Coal Company → Russell Creek No 2 Strip**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Centex Corp → Russell Creek No 2 Strip; 1976-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Russell Creek Coal Company → Russell Creek No 2 Strip; 1979-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Centex Corp → Russell Creek Coal Company; 1979-05-01 to current/open; source msha-controller-operator-history